antique leather book 3d model

Refine this existing 3D model into a complete antique closed book. Preserve the overall old leather style, but fix the geometry so the book is fully complete and solid. The bottom cover must be fully present and properly shaped. The book must not be hollow or empty inside. Add a thick visible block of aged pages, clearly visible on the side, top, and front edges. Show layered yellowed paper pages with realistic page thickness. Keep an old dusty look with cracked leather, worn corners, subtle scratches, and a vintage magical appearance. Improve the spine and cover structure so the book looks like a believable complete object, not an empty shell. Make the model clean, readable, detailed, and well-formed as a high-quality 3D book prop.